From 4de462c3e014c612b2aa5bbf7f056c747eb01687 Mon Sep 17 00:00:00 2001 From: Shaun Ruffell Date: Wed, 15 Dec 2010 18:54:49 +0000 Subject: [PATCH] wctdm24xxp, wcte12xp: Disable PCI read-line multiple command. There are some platforms where the read-line multiple transaction causes packets to be dropped in the voicebus pipeline. The only observable behavior is that packets just go "missing" in the pipeline. This also only appears to affect PCI cards. A typical 'symptom' of this problem is you may see IRQ misses increasing without any corresponding "bumps" in latency in the kernel message log. Normally, IRQ misses are correlated to latency bumps since that is an indication that the host was not able to service the card interrupt in a timely fashion. DAHDI-510 DAHDI-774 Signed-off-by: Shaun Ruffell Signed-off-by: Russ Meyerriecks Acked-by: Kinsey Moore git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9542 a0bf4364-ded3-4de4-8d8a-66a801d63aff --- drivers/dahdi/voicebus/voicebus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dahdi/voicebus/voicebus.c b/drivers/dahdi/voicebus/voicebus.c index 63aba52..2848327 100644 --- a/drivers/dahdi/voicebus/voicebus.c +++ b/drivers/dahdi/voicebus/voicebus.c @@ -628,7 +628,7 @@ vb_reset_interface(struct voicebus *vb) unsigned long timeout; u32 reg; u32 pci_access; - const u32 DEFAULT_PCI_ACCESS = 0xfffc0002; + const u32 DEFAULT_PCI_ACCESS = 0xffdc0002; u8 cacheline_size; BUG_ON(in_interrupt());